Supertech VW 1.8T 20V 81mm 32.7mm CH -4cc Dish 9.3:1 CR Piston - Set of 4 (Excl Rings)

These Supertech pistons are forged from high-strength aluminum, a common choice for performance engine builds because it offers a good balance of strength and light weight. Each piston in this set features a -4cc dish, which helps achieve a 9.3:1 compression ratio when paired with the correct cylinder head and gasket combination. This specific compression ratio is often sought after for naturally aspirated or moderately boosted applications, providing a good compromise between power and reliability.

The 81mm bore size is standard for many VW 1.8T 20V engines, and the 32.7mm compression height is critical for proper valve timing and piston-to-valve clearance. Because these are performance pistons, it's important to ensure your engine block is properly machined to accept the 81mm bore, and that your connecting rods are compatible with the 32.7mm wrist pin. This set is designed for a 4-cylinder engine and includes four pistons, but remember that the piston rings are sold separately, so you'll need to source those to complete the installation.

When rebuilding or upgrading your 1.8T engine, using well-made pistons like these from Supertech is a solid choice. They are built to handle the demands of performance driving and can be a key component in achieving your engine's power goals. Always refer to your engine's specific service manual for detailed installation procedures, torque specifications, and recommended clearances to ensure a successful build.